Last June, Portland General Electric released a comprehensive, multiyear water quality study of Lake Billy Chinook, the rivers that supply it, and the lower Deschutes River into which water is released. Among other things, the report showed that the Crooked River contains significant amounts of pollution. This pollution combined with sunlight generates suspended algae on the surface of Lake Billy Chinook which is subsequently released into Lake Simtutus and then the lower Deschutes River. Algae blooms are increasing in occurrence, leading the Oregon Health Authority to warn last June that “harmful algae blooms” could “routinely develop in the lake”.
One of the shortcomings in the Habitat Conservation Plan is lack of adequate consideration for water quality. Clearly, high temperatures and pollution can have adverse impacts on fish and the aquatic environment, including mortality (“take”). Irrigation return flows are “covered activities” but the HCP does not adequately examine impacts on water quality from agricultural runoff or provide for minimum standards in covered waterways.Read More »
The long awaited Habitat Conservation Plan for the Deschutes Basin was recently released. Like many in the environmental community, I find the HCP to be deeply flawed. Below is a high level summary. The HCP will be the subject of a series of posts over the next two weeks, each providing detail on a particular part of this complex topic. Here is the official web site. It is hard to overstate the importance of the HCP as it will determine the fate of most rivers in Central Oregon for the next 30 years.Read More »
I have written about the “Blob” in the past (most recently, here and here). It is the much higher ocean temperatures in the North Pacific which have disrupted food chains and imperiled many historic fish runs. An argument can be made that ocean heating is currently the most worrisome of all the conditions leading to the drastic declines in salmon and steelhead populations in the Pacific Northwest. Here is the first part of a three-part article from NOAA discussing the Blob. Below is a graphic showing the re-emergence of the Blob this year. It could be worse than the original one, it already has more area of the most extreme warming, and is still forming.
Here’s a final comment on the recent PRB Fisheries Workshop. While I respect the earnest effort being put into the reintroduction effort there is just no getting around the fact that results remain dismal. A total of 36 upper basin origin adult steelhead returned in the 2018/2019 season (17 the year before), 5 spring chinook returned in 2018 (20 in 2017, the numbers are going to be better but still low for 2019), and 38 sockeye returned in 2018. This is simply depressing numbers but it doesn’t mean the reintroduction effort should be abandoned or ridiculed. Anadromous fish were denied passage since the mid-1960s and re-establishing them is going to take time. Short of tearing out the dams, the efforts based on the best available science are being made to establish viable upper basin populations and a roadmap for doing so can now be found on PGE’s website. (Go to 2019 Fisheries Workshop Resources / Reintroduction Roadmap.) They have a long way to go but an honest and determined attempt is being made.
The July 24th Source Weekly contained a guest column by Greg McMillan, president of the Deschutes River Alliance, that needs a response. It is absolutely true that attempts to reintroduce salmon and steelhead into the upper Deschutes basin above Lake Billy Chinook have been extremely disappointing. It is important to understand, however, that adult returns for salmon and steelhead have been plunging in the entire Columbia River basin and much of the Pacific Northwest. The truth is that many anadromous fish runs are on the path to extinction due to habitat loss, dams, over harvest, hatcheries, and the heating of the Pacific which has led to the collapse of the food web in many areas. This has nothing to do with local reintroduction efforts.Read More »
The fish ladder at the Opal Springs Hydroelectric Project at the mouth of the Crooked River is nearing completion. Scheduled to go online this fall, volitional passage could be a huge shot in the arm for reintroduction efforts as the overwhelming majority of adult steelhead and chinook passed into Lake Billy Chinook try to go up the Crooked. The Crooked River Watershed Council has released this video about the passage project which is worth viewing.Read More »
Rod French, ODFW’s Mid-Columbia District Fish Biologist, presented at last week’s Fisheries Workshop. This annual presentation by ODFW has been largely unchanged for years, which is excellent news. Trout have been surveyed in the lower Deschutes since the 1970s and there have been no observed negative impacts on them from the operation of the Selective Water Withdrawal tower in Lake Billy Chinook. If anything, trout are larger and more abundant now, which is to be expected given the more natural temperature profile of the river. Below are a lot more details, or take a look at Rod’s presentation.Read More »